Acute alveolar sarcoidosis in a 25-year-old man

A previously healthy, 25-year-old man presented with fever, cough and dyspnoea for 1 week. A chest radiograph showed multiple bilateral nodular, mass-like opacities (figure 1A). Moreover, chest CT revealed multiple bilateral dense consolidations with central-air bronchograms and ill-defined micronodular and ground-glass margins (figure 1B). The bilateral hilar and mediastinal lymph nodes were enlarged (online supplementary figure 1A). Blood tests revealed C-reactive protein, ACE and lysozyme levels of 3.98 (normal <0.30) mg/dL, 7.9 (normal <21.4) IU/L …